The Minimax M3 water softener, manufactured by Harvey Water Softeners, is one of our top 3 water softeners.

Read on to find out why this is such a popular model…


The Minimax M3 Water Softener is the latest generation in water softening design. Its advanced twin cylinder technology is extremely efficient and means you will have softened water 24 hour a day, 7 days a week. It conveniently runs on block salt, which is easier to handle, store and load compared to tablet salt. It’s compact and fits under your kitchen sink.


The Minimax M3 softener is proudly Made in Britain by Harvey Water Softeners, to the highest engineering standards and uses the latest design in water softening technology.  The Minimax M3 water softener works with all different types of British plumbing systems and all household sizes. With high flow rates, accurate displacement meters, twin-cylinder technology and no electricity needed, this water softener is built to last and comes with a a 10 year parts guarantee from the date of purchase.

Installation and Maintenance

Installing the M3 is a straightforward process. It needs to be installed at the mains water supply which is usually under the kitchen sink. The installation usually takes around half a day, depending on the existing pipework and location. Minimax Water Softeners require minimal maintenance. You just need to replenish the block salt when the red line is visible and book a service in with us once a year.


  • Twin cylinder technology
  • Accurate metering
  • Up to 3 bathrooms
  • Non-electric
  • High flow rates
  • Softened water 24/7
  • Runs with convenient block salt
  • Compact design
  • Fits neatly under the kitchen sink
  • 10 year guarantee

If you would like to find out more about the Minimax M3, or any of our other water softeners, please get in touch.